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170 lines
5.1 KiB
170 lines
5.1 KiB
/* SPDX-License-Identifier: GPL-2.0-or-later */ |
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/* |
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* Copyright (C) International Business Machines Corp., 2000-2001 |
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*/ |
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#ifndef _H_JFS_DINODE |
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#define _H_JFS_DINODE |
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/* |
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* jfs_dinode.h: on-disk inode manager |
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*/ |
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#define INODESLOTSIZE 128 |
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#define L2INODESLOTSIZE 7 |
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#define log2INODESIZE 9 /* log2(bytes per dinode) */ |
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/* |
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* on-disk inode : 512 bytes |
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* |
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* note: align 64-bit fields on 8-byte boundary. |
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*/ |
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struct dinode { |
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/* |
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* I. base area (128 bytes) |
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* ------------------------ |
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* |
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* define generic/POSIX attributes |
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*/ |
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__le32 di_inostamp; /* 4: stamp to show inode belongs to fileset */ |
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__le32 di_fileset; /* 4: fileset number */ |
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__le32 di_number; /* 4: inode number, aka file serial number */ |
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__le32 di_gen; /* 4: inode generation number */ |
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pxd_t di_ixpxd; /* 8: inode extent descriptor */ |
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__le64 di_size; /* 8: size */ |
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__le64 di_nblocks; /* 8: number of blocks allocated */ |
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__le32 di_nlink; /* 4: number of links to the object */ |
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__le32 di_uid; /* 4: user id of owner */ |
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__le32 di_gid; /* 4: group id of owner */ |
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__le32 di_mode; /* 4: attribute, format and permission */ |
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struct timestruc_t di_atime; /* 8: time last data accessed */ |
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struct timestruc_t di_ctime; /* 8: time last status changed */ |
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struct timestruc_t di_mtime; /* 8: time last data modified */ |
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struct timestruc_t di_otime; /* 8: time created */ |
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dxd_t di_acl; /* 16: acl descriptor */ |
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dxd_t di_ea; /* 16: ea descriptor */ |
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__le32 di_next_index; /* 4: Next available dir_table index */ |
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__le32 di_acltype; /* 4: Type of ACL */ |
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/* |
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* Extension Areas. |
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* |
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* Historically, the inode was partitioned into 4 128-byte areas, |
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* the last 3 being defined as unions which could have multiple |
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* uses. The first 96 bytes had been completely unused until |
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* an index table was added to the directory. It is now more |
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* useful to describe the last 3/4 of the inode as a single |
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* union. We would probably be better off redesigning the |
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* entire structure from scratch, but we don't want to break |
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* commonality with OS/2's JFS at this time. |
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*/ |
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union { |
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struct { |
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/* |
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* This table contains the information needed to |
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* find a directory entry from a 32-bit index. |
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* If the index is small enough, the table is inline, |
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* otherwise, an x-tree root overlays this table |
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*/ |
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struct dir_table_slot _table[12]; /* 96: inline */ |
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dtroot_t _dtroot; /* 288: dtree root */ |
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} _dir; /* (384) */ |
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#define di_dirtable u._dir._table |
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#define di_dtroot u._dir._dtroot |
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#define di_parent di_dtroot.header.idotdot |
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#define di_DASD di_dtroot.header.DASD |
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struct { |
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union { |
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u8 _data[96]; /* 96: unused */ |
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struct { |
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void *_imap; /* 4: unused */ |
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__le32 _gengen; /* 4: generator */ |
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} _imap; |
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} _u1; /* 96: */ |
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#define di_gengen u._file._u1._imap._gengen |
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union { |
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xtpage_t _xtroot; |
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struct { |
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u8 unused[16]; /* 16: */ |
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dxd_t _dxd; /* 16: */ |
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union { |
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__le32 _rdev; /* 4: */ |
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/* |
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* The fast symlink area |
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* is expected to overflow |
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* into _inlineea when |
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* needed (which will clear |
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* INLINEEA). |
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*/ |
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u8 _fastsymlink[128]; |
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} _u; |
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u8 _inlineea[128]; |
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} _special; |
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} _u2; |
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} _file; |
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#define di_xtroot u._file._u2._xtroot |
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#define di_dxd u._file._u2._special._dxd |
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#define di_btroot di_xtroot |
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#define di_inlinedata u._file._u2._special._u |
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#define di_rdev u._file._u2._special._u._rdev |
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#define di_fastsymlink u._file._u2._special._u._fastsymlink |
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#define di_inlineea u._file._u2._special._inlineea |
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} u; |
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}; |
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/* extended mode bits (on-disk inode di_mode) */ |
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#define IFJOURNAL 0x00010000 /* journalled file */ |
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#define ISPARSE 0x00020000 /* sparse file enabled */ |
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#define INLINEEA 0x00040000 /* inline EA area free */ |
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#define ISWAPFILE 0x00800000 /* file open for pager swap space */ |
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/* more extended mode bits: attributes for OS/2 */ |
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#define IREADONLY 0x02000000 /* no write access to file */ |
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#define IHIDDEN 0x04000000 /* hidden file */ |
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#define ISYSTEM 0x08000000 /* system file */ |
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#define IDIRECTORY 0x20000000 /* directory (shadow of real bit) */ |
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#define IARCHIVE 0x40000000 /* file archive bit */ |
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#define INEWNAME 0x80000000 /* non-8.3 filename format */ |
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#define IRASH 0x4E000000 /* mask for changeable attributes */ |
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#define ATTRSHIFT 25 /* bits to shift to move attribute |
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specification to mode position */ |
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/* extended attributes for Linux */ |
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#define JFS_NOATIME_FL 0x00080000 /* do not update atime */ |
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#define JFS_DIRSYNC_FL 0x00100000 /* dirsync behaviour */ |
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#define JFS_SYNC_FL 0x00200000 /* Synchronous updates */ |
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#define JFS_SECRM_FL 0x00400000 /* Secure deletion */ |
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#define JFS_UNRM_FL 0x00800000 /* allow for undelete */ |
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#define JFS_APPEND_FL 0x01000000 /* writes to file may only append */ |
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#define JFS_IMMUTABLE_FL 0x02000000 /* Immutable file */ |
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#define JFS_FL_USER_VISIBLE 0x03F80000 |
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#define JFS_FL_USER_MODIFIABLE 0x03F80000 |
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#define JFS_FL_INHERIT 0x03C80000 |
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/* These are identical to EXT[23]_IOC_GETFLAGS/SETFLAGS */ |
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#define JFS_IOC_GETFLAGS _IOR('f', 1, long) |
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#define JFS_IOC_SETFLAGS _IOW('f', 2, long) |
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#define JFS_IOC_GETFLAGS32 _IOR('f', 1, int) |
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#define JFS_IOC_SETFLAGS32 _IOW('f', 2, int) |
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#endif /*_H_JFS_DINODE */
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